It's on my hard tail
Mainly ride the red route at pines, Cannock ect....
Like the faster down hill sections, but recently the chain keeps jumping off the front
Run a hope top guide with a mesh bottom roller

chain jumping off a single ring with no front mech or other device to hold it on ? - not down to length IMO

You prob should consider at least one of:

chainring with variable width of teeth - or at least a SS chainring
rear mech with a clutch doodah (maybe yours already has ?)
retention device (or even just bashring one side and a keeper ring or jumpstop on the inside)

Can you post up a pic of the setup in the biggest gear at the back (largest cog, not highest gear). Let's see the angle of your dangle, and we can then guess whether you can lose another pair of links.

I run a hope chain device and a mesh bottom roller tensioner as posted in my original post

Still, if chain/ring is "secured" correctly at top & bottom it shouldn't be possible to ship the chain from the front - should it ? Is the tension spring(s) OK in the mech ? Do you back-pedal a lot to rearrange your feet for corners ?

(looks to me like you could get a couple of links out of that, but I don't use SRAM mechs. What cog at the back do you use when descending ? if it's a small one, your chain will still have slack in it)

Thank you for all the input, I've removed 3 links - it's allot better
I think I've found the route of my problem, my derailleur has become weak, the springs are soft all of a sudden, gonna swap it for anther sram xo if it arrives tomorrow